Automatic door locking assemblies



June 25, 1963 P. M. DoMslc ETAL 3,095,225

AUTOMATIC DOOR. LOCKING ASSEMBLIES JNVENToRs PAU/ M. DoMs/c BY HAROLD J. D/ELMAN June 25, 1963 P. M. DoMslc ETAL 3,095,225

AUTOMATIC DooR. LOCKING AssEMBLIEs Filed Jan. 29, 1962 4 Sheets-Sheet 2 IN V EN TORS PA UL M. DoMs/'c By HAROLD J7 D/ELMAN @Mn/JM June 25, 1963 P. M. DoMslc ETAL AUTOMATIC DOOR. LOCKING ASSEMBLIES 4 Sheets-Sheet 3 Filed Jan. 29, 1962 INVENTORS PAUL M. Dams/c HAROLD l D/ELMAN A #om ey June 25, 1963 P. M. DoMslc ETAL AUTOMATIC DOOR. LOCKING ASSEMBLIES Filed Jan. 29, 1962 4 Sheets-Sheet 4 INVENTORS PAUL M. DOM/C BY HAROLD J D/ELMAN United States Patent O 3,095,225 AUTQMATC DOR LQCKWG ASSEMBLES Paul M. Doxnsic, Cleveland, and Harold J. Dieiman, Lyndhurst, Ohio, assignors to The Sanymetal Products Company, lne., Cleveland, Ghio, a corporation of Gino Filed Jan. 29, i962, Ser. No. 169,212 Claims. (Cl. 292-169) This invention relates to automatic door locking assemblies, and more particularly to a door locking structure which includes a lock case designed to be inserted and pocketed within a relatively thin door body, and which slidably supports a primary lockbolt'slide and an associated secondary slide; and which also includes operative means adapted to manually manipulate the secondary `slide in one direction to thereby maintain the lockbolt of the primary slide in rigidly extended door loclc'ng position, to manually `manipulate the primary slide in the opposite direction to thereby forcibly retract the lockbolt from door locking position, `and to automatically return the primary and secondary slides to a neutral position so that the lockbolt of the primary slide returns to its normal resiliently extended position for camrning engagement with an adjacent `doorframe-supported keeper member when the door is swung to closed position.

This invention embodies important improvements over the door structure and latching assembly disclosed in the Benham Patent 2,876,873, granted March l0, 1959, and which employs a latch case contained within the door body which slidably supports a `single latch slide `from which the latch bolt extends, and which is slidably rnanipulated by a rcani lug iixed to escutcheon medallions rot-atably mounted on the door body. In that latching assembly, the door must be held in vfully closed position to thereby align its latch ibolt with the latch bolt hole in the keeper plate mounted on the adjacent door frame, before the latch slide `can be manually manipulated to project its latch bolt into the latch hole lof the doorfrarnesupported keeper plate. To unlatch the door, the latch slide of that latcliing assembly is manually manipulated to retract its latchbolt from the latchbolt hole of the doorframe, `and is then maintained in retracted position so that the door can again be swung into closed position.

The door locking structure made in `accordance with this invention, includes ia lock case designed to be inserted within the door body, and which slidably supports a primary slide from which the lockbolt extends, and also slidably supports a secondary slide norm-ally maintained in spaced relation to the primary slide by resilient means, such las `a resilient spring. The primary slide includes a slide block whose opposite ends `are designed to freely slide within guide channels forming a part of the lock case. The lockbolt is rigidly or integrally secured to the front face of the slide block of the primary slide, and is designed to project through a conforming hole formed in the face plate of the lock case. A cam arm extending rearwardly from the rear face of the slide lock of the primary slide, extends into a receiving groove formed in the secondary slide, and terminates in a hook portion presenting a camming edge. An auxiliary guide arm extending rearwardly from the slide block of the primary slide, may also be provided, and which is designed to slide within fan appropriate groove formed in the secondary slide. The latchbolt associated with the primary slide is preferably generally rectangular in cross-section, and preferably presents an arcuately crowned end face designed to resiliently cam against the cam 4face of a doorframe-supported keeper plate when the door is swung into closed position.

The secondary slide may be rectangular in form, and P presents upper and lower faces designed to slide in the guide channels of the lock case. A resilient spring is positioned between the front lface of the secondary slide and the rear ila'ce `of the slide block of the primary slide, and maybe supported by spring receiving pockets or holes formed therein. The secondary slide has a camming hole extending therethrough which presents an internal camrning rim or particular shape and contour, and which at lleast in part exposes the `camini-ng edge presented -by the foam arm of the primary slide.

A camming element extends into the canin-ring hole of the secondary slide, and is designed to engage the camming rim of the secondary slide as well as the camming rim of the fcam Aarm of the primary slide. The camming element may be made in the form of a pair of diametrrioal-ly opposed camming trunnions iixed to a pair of circular escutcheon medallions which are rotatably supported in `circular seating rims presented by the side faces of the door body. By appropriate clockwise and lcounterclockwise rotative movement of a handle bar or knob extending yfrom one or both escutcheon medallions, the carnrning trunnions may be rotated clockwise or `countericlockwise into camming engagement with particular rim portions of the camming hole in the secondary slide, @and into cannning engagement with the carnming rim of the cam anni extending from the primary slide.

When the door is open, the camming trunnions are maintained in neutral position by expansion of the resilient spring, and |the expanded spring then projects the lockbolt of the primary slide into resiliently extended position, and in a position to resiliently cam against the cam face of a doorrameeupported keeper plate when the door is yswung to `closed position. To lock the closed door, the handle 'bar or knob and associated camming element or icamming trunnions are rotated in one direction 'for a ydistance of appnoximately ninety degrees from neutral position, to thereby yadvance the lsecondary slide in a position closely adjacent the slide block of the primary slide, with resultant compression of the resilient spring, which thereupon maintains the lockbolt of the primary slide in rigidly extended locking position. To unlock the door, the handle bar or knob and associated camming element or camming trunnions, are rotated in the opposite direction from locking position to neutral position, and thence further rotated in said opposite direction for Ian additional forty-five degrees, vwhereupon the lcarnming element engages and drives the cam `arrn and associated primary slide in a rearward direction, to thereby 'forcibly retract the lockbolt from locking position and simultaneously cornpress the resilient spring to a suicient extent to permit opening movement o-f the door. When the handle bar is released, the oarnming trunnions are automatically `swung to neutral position by expansion of the resilient spring, 'and the expanding spring also drives the primary slide in an `outward direction to project its lockbolt into resiliently extended position, and in position for carrnning engagement with the earn face of the do orfrarne-supported keeper plate when the door is again swung to closed position.

The automatic door locking structure of this invention is particularly designed for association with a reversible doorframe-supported keeper plate, which presents a lockbolt receiving hole whose vertical axis is designed to be located on the center line of the jamb face of the doorframe. The keeper plate presents a camming face on one side of its lockbolt receiving hole, and a laterally projecting door stop face on the other side of the lockbolt receiving hole, and against which the lockbolt is designed to abut when the door is closed. By making the keeper plate and associated door stop in a manner to permit reversible mounting thereof on the supporting door frame, the door body may be mounted in the eld to swing either inwardly or outwardly, since the lockbolt and door locking structure of this invention are 4designed to cooperatively interlock with the keeper plate mounted to present its door stop at either the left hand or right hand side of the doorframe.

Automatic door locking assemblies may be made m accordance with thisinvention from relatively few parts, and can be manufactured and installed at relatively low cost. The lock case, primary slide, and secondary slide of the door locking structure, may each be integrally cast or molded from metal or plastic materials. The locking structure of this invention may be assembled as a unit for insertion into a receiving pocket formed in door bodies made of wood, or hollow metal, or other materials. The face plate of the latch case is designed for rigid attachment to the jamb face of the door body to support the latch case in cantilever suspension, and the face plate may be contoured in streamlined symmetry with the jamb edge of the door body.

The keeper plate and associated door stop element may be cast or molded as an integral unit, or made in two parts, and can be formed of minimum material at low cost. The keeper plate and door stop structure may be designed for attachment to the jamb edge of either wood or hollow metal doorframes in contour symmetry with the jamb edge of the doorframe, and without overlapping the side faces of the doorframe. The face plate of the door-supported locking structure may present a depressed area around its lockbolt hole, to receive the projecting doorstop element of the keeper structure, and its doorstop element need project no more than onequarter inch from the opposite cam face of the keeper plate, so that the jamb faces of the door body extending above and below the lockbolt, and the jamb faces of the -doorframe extending above and below the doorstep element and keeper plate, may be placed in closely adjacent relation with minimal clearance therebetween, when the door and doorframe are erected in the eld.

Other objects and advantages of this invention will become apparent as the disclosure proceeds.

Although the characteristic yfeatures of this invention will be particularly pointed out in the claims, the invention itself, and the manner in which it may be made and used, may be better understood by referring to the following description taken in connection with the accompartying drawings forming a part hereof in which:

FIG. 1 is an elevational view of a typical form of swingably mounted door and adjacent doorframe post having the door locking assembly of this invention in mounted association therewith;

FIG. 2 is a fragmentary elevational view of the locking edge of the door and the exposed edge face of the door locking structure in mounted association therewith, and as the same would appear when viewed along line 2 2. of FIG. 1; V

FIG. 3 is a fragmentary elevational view of the locking edge of the doorframe-forming post, and the reversible keeper plate and doorstop structure mounted thereon, and which is designed to cooperate with the door mounted locking structure, this View being taken along line 3-3 of FIG. l;

FIG. 4 is a fragmentary horizontal section of the door, adjacent doorframe forming posts, and associated door locking structure and keeper plate and doorstop structure, as the same would appear when viewed along line 4--4 of FIG. 1;

FIG. 5 is a fragmentary transverse section of the door body supported locking structure and the doorframe supd ported keeper structure, and which illustrates the relative position of the primary and secondary slides when the lockbolt of the primary slide is in resiliently extended neutral position, and about to move into resilient camming engagement with the cam face of the pilaster mounted keeper plate during initial closing movement of the door;

FIG. 6 -is another fragmentary transverse section of the door body-supported locking structure and doorframesupported keeper structure, and which illustrates the relative position of the primary and secondary slides and the resiliently retracted position of the lockbolt, as the same would appear as the lockbolt moves across the camming face of the keeper plate during iinal closing movement of the door;

FIG. 7 is a further fragmentary transverse section of the door body-supported locking structure and doorframesupported keeper structure, and which illustrates the relative position of the primary and secondary slides and the rigidly extended position of the lockbolt when interlocked with the keeper structure;

FIG. 8 is a further fragmentary transverse section of the door body-supported locking structure and the door- Y frame-supported keeper structure, and which illustrates the relative position of the primary and secondary slides and the retracted position of the lockbolt when disengaged from the keeper structure, so that the door can be swung to open position;

FIG. 9 is an elevational view of the locking structureA as it appears prior to application of the secondary escutcheon medallion to the axial trunnion and camming trunnions which extend from the primary escutcheon medallion; t

FIG. 10 is a perspective View illustrating the lock case, the primary slide and the secondary slide components of the locking structure in exploded relation;

FIG. 11 is a perspective view of the several components Y which form the primary slide, shown in exploded relation;

FIG. 12 is another perspective View of one component of the primary slide which illustrates further structural details thereof;

FIG. 13 is a perspective view of the rear face of the primary escutcheon medallion, and showing .the camming trunnions and axial trunnion extending from the inside face thereof;

FIG. 14 is a perspective View of the outer face of the primary escutcheon medallion shown in FIG. 13;

FIG. 15 is a perspective view of the rear face of the secondary escutcheon medallion, and .showing the holes `formed on the inner face thereof which are designed to receive the insert studs extending from the trunnions of the primary escutcheon medallion when the paired escutcheon medallions and associated camming trunnions are assembled to the door body in operative relation with the primary and secondary slides; Y

FIG. 16 is a perspective View of the outer lface of the secondary escutcheon medallion shown in FIG. 15, and showing a handle bar formed on the outer face thereof;

FIG. 17 is a fragmentary perspective view of the carnming trunnions and axial trunnion associated with the primary escutcheon medallion shown in FIG. 13, this view showing a resiliently lingered locking washer applied to the projecting stud of the axial trunnion, and which is designed to interlock with the axial hole formed in the inner `face of the secondary escutcheon medallion shown in FIG. 15 when the paired escutcheon medallions are assembled to the door Ibody;

FIG. 18 is a fragmentary vertical section of the door mounted locking structure as the same would appear when viewed along line 18-18 of FIG. l, this view showing in further detail the manner in which ythe circular escutcheon medallions may be rotatably mounted on the door body, the manner in which the escutcheon medallions are interlocked together in operative relation, and the position of the camming trunnions in relation to cam rim portions of Vthe primary and secondary slides when the camming trunnions are in neutral position;

FIG. 19 is an elevational view of the locking structure as it appears when the secondary escutcheon medallion is removed, and which illustrates the relative position of the camming trunnions and primary and secondyary slides when in neutral position and when the lockbolt of the primary slide is resiliently extended as indicated in FIG. 5;

FIG. 20 is an end view of the locking structure as viewed in the direction of the arrows 20-20 of FIG. 19;

FIG. 21 is another elevational view of the locking structure as it appears when the secondary escutcheon medallion is removed, this view illustrating the relative position of the primary and secondary slides when the lockbolt of the primary slide has ibeen depressed by carnming engagement with the cam face of the keeper plate as indicated in FiG. 6, without movement of the camming trunnions from neutral position;

FiG. 22 is a transverse section of the locking structure as viewed alonU line ZZ-ZZ of FIG. 2l, and as the same would appear prior to application of the secondary escutcheon medallion to the trunnions of the primary escutcheon medallion;

FIG. 23 is an elevational view of the locking structure as the same would appear when the secondary escutchcon medallion is removed, this view showing the position of the camming trunnions when rotated counterclockwise through an angle of approximately ninety degrees from neutral position, and to thereby -advance the secondary slide substantially in abutting relation against the .rear face of the slide block of the primary slide and thereby maintain the lockbolt of the primary slide in rigidly projected locking position as indicated in FIG. 7;

FIG. 24 is a vertical section of the locking structure as viewed along line 24-2'4 of FIG. 23;

FIG. 25 is an elevational view of the locking structure as the same appears when the secondary escutcheon medallion is removed, this view showing the position of the camminf trunnions after they have been rotated clockwise through a distance of approximately forty-ve degrees from neutral position, and to thereby engage the cam arm of the primary slide and move both the primary and secondary slides rearwardly to forcibly retract the loci-:bolt of the primary slide from door locking position as indicated in FIG. 8;

FIG. 2.6 is an elevational view or" a meditled Iform of locking structure made in accordance with this invention, and as it 4would appear prior to application of the secondary escutcheon medallion to the trunnions of the primary escutcheon medallion;

FIG. 27 is a perspective view illustrating the latch case, the primary slide and the secondary slide .components of the modilied locking structure shown in FIG. 26, and shown in exploded relation;

FIG. 28 is a perspective view of the primary latch slide of the modied locking structure shown in FIGS. 26 and 27;

PEG. 29 is another perspective view of the modified primary slide as shown in FG. 28 and illustrating further structural details thereof;

FIG. 30 is a perspective view of the rear face of the primary escutcheon medallion designed for association with the modified locking structure shown in FIG. 26, this view showing the axial trunnion and associated diametrically opposed camming trunnions extending from the rear face thereof;

FIG. 3l is a perspective view of the outer yface of the primary escutcheon medallion shown FIG. 30;

PEG. 32 is a perspective View of the rear face of the secondary escutcheon medallion, and showing lthe holes formed in the rear face thereof which are designed to receive the insert studs extending 'from the trunnions of the primary escutcheon medallion shown in FIG. 30, when the paired escutcheon medallions and associated trunnions are assembled to the door body in operative Iassociation with the primary and secondary slides;

FIG. 33 is an exterior view of the secondary escutcheon medallion shown in FIG. 32 and which presents a handle knob on the outer face thereof; and

FIG. 34 is a fragmentary vertical section of the modified locking structure whose circular escutcheon medallions are rotatably mounted on circular seating rims lpresented by the side faces of the door body, this view showing in further detail the manner in which the escutoheon medallions are interlocked together in operative relation,

and the relative position of the camming trunnions and the cam edge portions of the primary and secondary slides when the cammiug trunnions are in neutral position.

Similar reference characters refer to similar parts throughout the several views of the drawings and the specification.

The door locking assembly of this invention comprises a door Alocking structure A designed for attachment to the jamb edge of a vdoor body B, and which is particularly designed for interlocking engagement with a keeper structure C mounted on the jan-1b edge of an adjacent doorframe forming post or pilaster D, as shown in FIGS. 1-8. The door locking structure A is particularly designed for association with relatively thin doors made from sheet metal, sheeted plastics, wood or other composition materials, and which is formed to provide a pocket which receives .the case section of a lock case 10. The lock case 1t? represents a face plate 15 designed to be secured to the jamb edge of the door body, Kand a case section which is designed to contain and slidably support a primary slide 2t) and a secondary slide 3i). The primary slide Ztl has a lockbo'lt 22 which projects through a lockbolt hole 17 in the face plate i5 of the lock case lil. The lockbolt 22 is normally maintained in rigidly extended position by resilient means, such as a helical spring 36 positioned between the primary slide 2G and secondary slide 3). A camming element, which may be in the form of a pair of diametrically opposed camming trunnions 45 and 45', extends through a camming hole 37 in the secondary slide 39, and is rotatably mounted on the door body for rotation in opposite directions from a neutral position. Rotation of the camming trunnions 45 and 45 in one direction from neutral position, moves the secondary slide in a forward direction to maintain the lockbolt 22 in rigidly extended position, and rotation of the camming -trunnions 45 and 45 in the opposite direction from neutral position operates to retract the lockbolt 22 to door-opening retracted position. When the camming trunnions 45 `and 45 are manually released from lockbolt retracted position, the camming trunnions automatically return to neutral position and the lockbolt 22 returns to resiliently extended position, under the iuuence of the resilient spring 36.

The locking structure A is particularly designed for cooperation with a keeper structure C made in accordance with this invention, and which is mounted on the jamb edge of the adjacent doorfrarne-forming post or pilaster D, as shown in `FIGS. 1 and 3 to 8 inclusive. The keeper structure C presents a body section lili) having a lockbolt receiving hole lill therein, an inclined cam face 102 on one side of the lockbolt hole lill, and a door stop element 103 on the other side of the lockbolt hole lill. The lockbolt 22 of the ylocking structure A is designed to abut the door stop element 193` when the door is in closed position, and when the lockbolt 22 is extended in the position as shown in FIG. 7, or in retracted position as shown in FIG. 8. The keeper structure 109 is designed to be reversibly mounted on `the iamb edge of the doorframe-forming post `or pilaster D, so that the door can be mounted to swing either inwardly or outwardly. This keeper structure is `designed to be coniined within the jamb edge and between the side faces of relatively thin doorframe-forming posts or pilasters, made from either metallic or plastic sheet materials, wood or other composition materials.

In this door locking assembly, the lockbolt 22 of the door locking structure A not only provides the means for locking the door in closed position, but also operates to maintain the door in closed position when not locked, and also provides abutment means which cooperates with the doorstep element of the keeper structure to limit the swinging movement yof the door. The face plate 15 of the door locking structure may present a depressed area or cavity 17 in surrounding relation to the lockbolt hole I7, which provides clearance for the projecting door stop 7 element'103 of the keeper structure, and so that the adjacent jamb edges of the door body and doorframeforming post or pilaster present only minimal door swinging clearance therebetween.

As shown more particularly in FIGS. 9 and 10, the lock case 10 of the door locking structure A presents a pair of spaced and parallel guide channels 11 each having a smooth interior web face 11 dened between a pair of guide ribs 11". A reinforcing side wall 12 joins adjacent guide ribs 11 of the spaced guide channels 11, and has a circular Window 12 therein through which the camming trunnions 45-45' and a part of the associated circular escutcheon medallion 40 project. The spaced guide channels 11--11 are rigidly secured at one end thereof to the rear face of a facing plate 15 and are supported in cantilever suspension therefrom. The inner ends of the spaced guide channels 11-11 may be provided with laterally projecting bosses 13 designed to brace against the inner surfaces of Ithe lock case receiving pocket 9 provided in the door body as shown in FIG. 4. The lock case l@ may be integrally cast from a suitable metal such as steel, aluminum or brass, or molded from a tough, strong and wear-resistant plastic compound.

The primary slide 20, as shown in FIGS. l0, 1l and l2, comprises a slide block section 21 which supports a lockbolt 22 extending forwardly therefrom and a cam arm 23 extending rearwardly therefrom. The slide block section 21 may be generally rectangular in form, and presents smooth end faces 21 designed to smoothly reciprocate within the spaced guide channels 11-11 of the lock case 10 and in sliding contact fwith the web faces 11-11 thereof, and is guided in its reciprocating movement by the smooth inner surfaces of the guide ribs 11"--11 of the guide channels Ill- 11. The lockbolt 22 is rigidly or integrally secured to the front face 21" of the slide block 21 and is designed to project through the conforming hole 17 provided in the face plate 15 of the lock case 10. The cam arm 23 rigidly projects from the rear face 21 of the slide block 21 of the primary slide, and presents a smooth upper edge 23' which forms a continuation `of the adjacent end face 21 of the slide block 21. 'I'he cam arm 23 also presents a lower edge 23" which is interrupted by a generally U-shaped cam slot 24 which :defines a camming rim 24 designed `to be engaged by one of the camming trunnions 45 associated with the rotatably mounted escutcheon medallions 40 and 50.

The lockbolt 22 is preferably rectangularV in cross-section and presents an arcuately contoured end face 22' and arcuate'ly contoured top and bottom faces 22". Its arcuately contoured end face Z2 is designed to cam against the cam face 162, of an -adjacent doorframe-supported keeper structure C and to abut against a door stop element 103 associated therewith when the door is closed. The lockbolt 22 -of the primary slide 20 is prefe-rably formed from a strong land wear-resistant plastic compound; and the entire primary slide ZlLincluding the lockbolt y22, slide block 21 and cam arm 23 may be integrally molded in one piece from a strong and wearresistant plastic compound. However, the slide block Z1 and cam arm 23 extending therefrom may be integrally cast from a suitable metal such as steel, aluminum or brass, and suitable means provided for rigidly securing the molded lockboltZZ to the front face Z1" of the metallic slide block 21. As shown in FIGS. l1 and l2, such securing means may comprise a threaded screw 25 inserted through a conforming hole 25 in the slide block and which is threaded into a threaded hole 25v formed in the rea-r face of the molded lockbolt 22. A pair of 'aligning pins 26 ixed to 'and projecting from the front 'face `21 of the primary slide 20, `and symmetrically spaced with respect to the screw receiving hole 25 in the slide block 21, are designed to project into symmetrically spaced receiving holes Z6' for-med in the rear face of the lockbolt 22. The projecting pins 26 serve to maintain the lockbolt 22 in proper Valignment when the lockbolt is secured tothe slide block 21 by the securing screw 25. The weight of the primary slide 2.@ may be materially reduced by forming windows or pockets y26x in the cast or molded slide block 211 thereof.

The secondary slide 3@ operates in conjunction with the camming trunnions LESS-t5 to manipulate and control the movement of the primary slide Ztl and its associated 'lockbolt ZZ. The secondary slide 30 is generally rectangular in form, and may be cast Ior molded as an integral unit from la suitable metal or la strong and Wearresistant plastic compound. The secondary slide 39 presents a smooth horizontal slide face 31 at the upper horizontal edge thereof, and a pair of spaced shoes 32 at the lower horizontal edge thereof which present smooth shoe faces v32 designed to slide along the smooth web face 1i' of the lower guide channel 11 of the lock ca-se 1), and in guided relation to the inner faces of the guide ribs 11" thereof. The upper horizontal slide face 31 is designed to smoothly slide along the smooth web face L11 of the upper guide channel 1v1 of the lock case 10, and is maintained in non-vibratory sliding contact therewith by an angular leaf spring 33 which is set between the spaced slide shoes 3.2 of the secondary slide. The ends 33 of the angular leaf spring 33 lare placed in gripping abutment 'against the inner faces of the spaced slide shoes, to thereby maintain the crown portion 33 of the leaf spring in resilient sliding contact with the web face 11 of the lower gu-ide channel 211 of the lock case.

A cam arm receiving groove 34 is formed in one of the side faces of the secondary slide 30 as shown in FIG. l0, and which presents a horizontally extending ledge portion 34 along which the lower horizontal edge 23 of the cam arm 23 of the primary slide 2G is slidably guided. The groove 34 also presents an inset side face 34" along which the ladjacent; side face of the cam arm 23 is slid-ably guided. When the primary slide 20 and secondary slide 39 are assembled together, the upper horizontal 'slide 4face 3-1 of the secondary slide -is substantially in liush alignment with the upper horizontalredge 23' of the cam arm 23 of the p-rimary slide, and the angular leaf spning 33 operates to maintain both of the adjacent horizontal slide faces 23 `and 31 in sliding contact with the smooth web face 111 of the upper guide channel 11 of the lock case, and in guiding contact with the inner faces of the guide ribs 11 thereof.

The secondary slide 3) presents a flat front face 35 in shape conformity with the rear face 21 of the slide block 21 of the primary slide Z6. T'ne rear face 2 of the slide biock 21 of the primary slide 20 and the front face 35 of the secondary slide 30 are normally maintained in spaced relation by resilient means, such as a helical spring 36 las shown in FIGS. 9 and l-l. The helical spring 36 may be supported by inserting one end thereof into a bored hole 36 formed .in the front face 35 of the secondary slide 3d, and by inserting the Iother end thereof into a corresponding bored hole 36" formed in the rear face yZim of the slide block -21 of the primary slide 20. The helical spring 36 serves to effectuate a predetermined manipulation of the primary slide 2,0l and its associated lockbolt 22, when the secondary slide 30 is .manipulated in la predetermined manner by rotation of the camming trunnions i5-#45' associated Withrthe escutcheon medallions 40 and 50.

Manipulation of the secondary slide 39 is effected by the provision of a camming hole 37 extending through the body of the secondary slide and which presents ya camming rim 37' of particular conguration asV shown in FIG. l0, and which may be divided linto seven cam rim portions which are designated for purpose of convenience as camrim portions a, b, c, d, e, j and g as shown in FIGS. 19, 2l, 23 and 25. The camrimportions a, b, c, d, e, fand g are designed to be engaged by the camming trunnnions 45 or 45 vwhen the rotatably mounted es-V cutcheon medallions 40 and 50 are rotated in a particular manner, as hereafter described. The secondary slide 30 may be cast or molded as an integral unit from a suit' n able metal or plastic compound, and its Weight may be reduced by forming windows yor pockets 39x therein.

The lock case 1i), prin ary slide 20 and secondary slide 30, along with the associated -lea spring 33 and helical spring 36, can be economically manufactured and quickly assembled together `at the factory. In assembling these components, the primary slide 2d is inserted into the latch ease through the rear end thereof, and the lockbolt 22 projected through the lockbolt receiving hole 17 in the face plate 15 of the latch case. The leaf spring -33 is lapplied to the -secondary slide 3?, and the resilient spring 36 is mounted between the primary and secondary slides When the secondary slide Si) is inserted into the latch case. These components may be maintained in assembled relation :during shipment `and handling by the provision of a lset screw 3S, threaded into the side Wall 12 of the lock case do as shown in FIGS. l0, 23 and 2.4. The rounded end of the set screw 3S is designed to project into a closed end abutment slot 38 formed .in the adjacent -side AWall `of the secondary slide 3G. The set screw 38 land cooperating closed end Islot 33' permit unobstructed but limited sliding movement of the secondary slide 3i? within the latch case, but prevents undesired withdrawal of the secondary slide 3G from the rear end of the lock case 1f.; when the components assembled together.

The camming trunnions 45 and 45 may be formed as an integral part of the primary escutcheon medallion `4t? as shown in FIGS. :13, 14 and 17. The primary escutcheon medallion 4t) presents a circular outer section 41 Whose circular rim is designed to ibe rotatably Asupported within a circular seating rim 42, which may be formed in 4the side wall of the door body as shown in FIG. 18, to present a circular rim Wall 4 terminating in an inturned lip 42 which provides a supporting seat for the rear face of the disc section 41. The circular seating rim 42 may be so formed that the exposed face of the outer section 41 of the escutcheon medallion is substantially ilush with the adjacent wall-forming face of the door body. A circular inner section 43, of smaller diameter than the outer section 41 and secured to the inner face thereof, is `designed to extend through the circular hole dened by the seating lip 42" of the circular supporting rim 42 of the door lbody and into the circular window 12' of the latch case 10.

An axial trunnion 44 extends from the rear face of the inner circular section 43 of the medallion 40. The diametrically opposed camming trunnions 45 and 45 also extend from the rear face of the inner circular section 43 of the medallion 40, and each presents a semi-cylindrical body surface designed to cam against lthe camming rim 37 of the secondary slide 39. A cylindrical bearing stud 46 of reduced diameter extends from the inner end of each of the carnrning trunnions 45 and 45 as shown more particularly in FIGS. 13, 17 and 18. An elongated shaft forming stud 47 provides a reduced diameter axial extension of the axial trunnion 44. The shaft lforming stud 47 has a peripheral groove therein which receives an expansion Washer 4S which Iis locked within the groove by means of a split ring 49. The expansion Washer 48 presents radially extending spring lingers 43' designed to secure the secondary escutcheon medallion 50 to the axial stud 47.

The secondary escutcheon medallion 9, as shown in FIGS. 15, 16 and 18, presents an outer circular section 51 designed to be rotatably supported by a circular seating rim 52 which may be formed in or otherwise presented by the adjacent face of the door body. This seating rim 52 presents a circular rirn Wall 52 within which the outer disc section '51 rotates, and an inturned seating lip 52" which provides a seat for the rear face of the outer disc section 51. An inner disc section 53- projects from the inner face of the outer disc section 51, and is reduced in diameter so as to extend through the hole defined by the seating lip 52" of the seating rim 52. An axial hole 54 is formed in the inner disc section 53 and is of sufcient depth to receive the axial Astud 47 projecting from the axial trunnion 44 of the escutcheon medallion 40. The interior cylindrical sur-face of the axial hole 54 is slightly greater in diameter than the diameter yof the axial stud 47, and presents a rough interior surface or ledge designed to grip the resilient radial lingers 48 of the expansion washer 4S. The inner face of the inner disc section 53 of the escutcheon medallion 56 also presents diametrically opposed holes 55 designed to receive the studs 46 projecting from the camming trunnions 45 and 45 associated with the primary escutcheon medallion 40.

The outer disc 41 of the secondary escutcheon medallion Si? is provided with a handle knob or bar 56 as shown in FIGS. 16 .and 17 and which may be cast integral therewith. The handle bar 56 may be advan-tageously shaped as shown in FIG. 16, to present recessed grooves 56" along the sides thereof so that it can be gripped by the iingers Without damage to lingernails. A similar handle bar may also Ebe formed on the outer disc section 41 of the primary escutcheon medallion 4d, or alternatively, the handle bar 55 may be applied to the `outer disc section 41 of the primary escutcheon medallion 4@ only. Where only one of the outer disc sections 5'1 or 41 is provided with a handle bar 56, the exposed flat face `of the other outer disc section may be advantageously provided with a slot 57 as shown in FIG. 14, into which the edge of a coin or other tool may be inserted, and by means of which the escutcheon medallions may be rotated to unlock the door in case of emergency.

Tlhe outer escutcheon medallion 46, comprisingl the outer disc section 41, the inner disc `section 43, the axial trunnion 44 and its projecting stud 47, as well as the diametrically opposed camming trunnions `45 and 45' and their axial studs l46, may he made as a one-piece casting at relatively low cost, and its exposed outer surfaces plated with bright metal. The secondary escutcheon medallion 5G, including its outer disc section 51, its inner disc section 53 and its handle bar 56, may yalso be integrally made as a one-piece casting, and its exposed surfaces plated with a 'bright metal.

The door locking structure A of this invention is mounted on the door body by inserting the guide channels 11 of the lock case 1d, with the primary slide 20 and secondary slide 30 previously mounted therein, into a receiving pocket formed in the door lbody. The face plate 15 of the lock case 16 is then suitably secured to the jamb edge of the door body so that the lock case is thereby supported in cantilever suspension. The axial trunnion 44 and camming trunnions 45 and 45' of the primary escutcheon medallion 45 are then inserted through the seating rim 42 of the door body, through the Window 12 in the side wall 12 of the lock case 10, and into the camming hole 37 ofthe secondary slide '30. In the same insertion operation, the outer disc section 41 of the escutcheon medallion 40 is placed in rotatably seated position on the seating rirn 42 of the door body.

The secondary escutcheon medallion Sti is then applied to the opposite face of the door body, with its outer disc section 51 rotatably positioned Within the seating rim 52 of lthe door body. Inward pressure is then exer-ted on both escutcheon medallions 40 and 50 to thereby drive the resilient fingers 48 of the expansion Washer 4% into the axial receiving hole 54 of .the secondary escutcheon medallion Sil, and simultaneously effecting insertion of the studs 46 projecting from the cam-ming trunnions 45 and 45 into the receiving holes 55 of the companion escutcheon medallion 58, as shown in FIG. 1S. When the expansion washer 48 is pressure driven into the axial hole 54 of the companion escutcheon medallion 5t?, the resilient lingers 43 of the expansion washer 4S are sprung into conical form by contact with the inner wall of the axial hole 54, and ffrictionally interlock therewith in a manner which prevents outward removal of the companion escutcheon medallion 50.

When the escutcheon medallions 40 and 50 have thus been mounted in operative position on the door body, and in operative association with the primary and secondary slides and 30the camming trunnions 45 and 45 may be rotatably manipulated to fand from neutral position, to and from locking position, and to and from unlocking position, by a proper rotation of the escutcheon' medallions 40 and 50 by means of the handle bar 56.

When the handle bar 56 is in neutral position, the lockbolt 22 of the primary slide 2G is maintained in resiliently extended position, as shown in FIGS. 5 and 19, by expansion of the helical spring 36. In neutral position, the camming trunnion 45 is approximately at the twelve oclock position, and has bearing contact with the curvilinear rimmed portion a of the camming rim 37' of the secondary slide as shown in FIG. 19, while the opposite camming trunnion 45? is at the six oclock position and is in camming contact with the straight edge portion d of the camming rirn37 of the secondary slide. yIn this neutral position, the helical spring 36 expands to drive the front face 21 of the primary slide 20 into abutment against the inside face 16' of the face plate 15 of the lock case 20, and resiliently maintains the lockbolt 22 in maximum projecting position. It will also be noted that when the fcamming trunnion 45 is in neutral position as shown in FIG. 19, it is `clamped between the cam rim portion a of the secondary slide 30 `and the cam rim portion g of the cam arm 24 of the primary slide 2t) by the expansion action of the helical spring 36, and the camming trunnions 45y and 45' are thereby held in neuytral position. The handle bar 56 is preferably positioned in substantial alignment with the opposite camming trunnions 45 and 45', -so that the handle bar 56 extends vertically when the camming trunnions are in neutral position.

When inward pressure is exerted against the arcuate end face 22' of the lockbolt 22, as indicated in FIGS. 6 and 21, the opposite camming trunnions 45 and 45 remain in neutral position, but the expanded helical spring 36 is compressed between the front face 35 of the secondary slide 30 and the rear face 21" of the slide block 21 of the primary slide 20. Inward compression is exerted on the lockbolt as it'cams against the camming surface 102 of the doorframe-supporting keeper plate C, and during closing movement of the door as illustrated in FIG. 6. When the door is fully closed, the cornpressed lockbolt 22 is 'automatically projected into the `lockbolt hole 101 in the doorframe-supporting keeper plate by expansion of the compression spring 36, and while the icamrning trunnions 45-45 remain in the neutral position -as shown in' FIG. 19. 'Ihe compressive travel of the lockbolt 22 is however, limited by the cam rim portion a ofthe cam slot 24 in the cam arm 23 of Ithe primary slide 20, which moves into abutment against the neutrally positioned camming trunnion 45 as shown in FIG. 21.V

After the llockbolt 22 has been resiliently projected into the lockbolt hole 101 of the doorframe-supporting keeper plate C, the lockbolt 22 may be locked in projected position by rotating the camming trunnions 45 and 45 in ya counterclockwise direction for a distance of approximately ninety degrees from neutral position, as indicated in FIG. 23. When rotated from neutral to locking position, the camming trunnion 45 moved counter-clockwise from the neutral twelve oclock position to the nine oclock position, and into camming engagement with the relatively straight cam rim portion b of the secondary slide 30, thereby advancing the front face of the secondary slide substantially into abutment against the rear face 21" of the slide block 21 of the prim-ary slide, with resultant compression of the helical spring 36 which thereupon maintains the front face 21" of the primary slide block 21 in abutment against the rear face 16 of the facing plate 15, and the lockbolt 22 in rigidly projected position. During movement from neutral to locking position, the camming trunnion 45 moves from its six oclock neutral position to the three oclock locking position, and into engagement with the cam rim portion e Iand into abutting contact with the limit-stop cam rim portion f of the secondary slide 30, land which thereupon prevents further counter-clockwise rotation of the camming trunnions 45 and 45', yas shown in FIG. 23.

When the lockbolt 22 is in rigidly extended locking position as shown in FIG. 23, the camming trunnions 45 and 45 `are maintained in locking position by the compressed helical spring 36, which maintains the cam rim portion b of the secondary slide 30 in pressure contact with the camming trunnion 45, so that the door can only -be unlocked by a manually applied clockwise rotation of the escutcheon medallions 40 and 50 from locking position to neutral position. When the camming trunnions 45 and 45 are rotated in a clockwise direction from locking position as shown in FIG. 23 to the neutral position as shown in FIG. 19, expansion of the helical spring 36 moves the secondary slide 30 rearwardly to the position shown in FIG. 19, and Vthe expanded spring 36 then maintains fthe lockbolt 22 in resiliently extended position and within the lockbolt hole 1011 of the .doorframe-supported keeper structure C.

To retract the lockbolt 22 from its inserted position within the lockbolt hole 101 of the `doorfrarne-supported keeper structure C, the camming trunnions 45 and 45' are manually rotated, from the neutral position as shown in FIG. 19, in a clockwise direction Ifor approximately forty-five degrees, as shown in FIG. 25. During this clockwise rotation, the camming trunnion 45 cams against the cam edge g `of the cam arm 23 of the primary slide 20 as shown in FIGS. 19 and 25 and draws the cam arm 23 rearwardly, to thereby forcibly Iretract the lockfbolt 22 associated with the primary slide, so that its arcuate end face 22 will be fully Withdrawn from the lockbolt hole 101 of the doorframe-supported keeper structure C as shown in FIG. 8, and permitting opening movement of the door. When the camming trunnion 45 fhas been rotated to idoor unlocking position as shown in -FIG. 25, further clockwise rotation thereof is prevented by the companion camming tmnnion 45 which then abuts the cam rim portion c lof Vthe secondary slide 30. i Thus, the lockbolt 22 can be Withdrawn to retracted position only by manual clockwise rotation of the handle bar 56. 'Ihe handle bar 56 is manually Iheld in lunlocking position -until the door is opened, and When the handle bar. 56 is then released, expansion of the resilient spring 36 automatically returns the camming trunnions 45-45' from unlocked position as shown in lFIG. 25 to neutral position as shown in FIG. 19.

'The modified door locking assembly as shown in iFIGS. 26-34 has the same operating characteristics as the locking assembly shown in FIGS. 9-25 and previously described. 'l'lhe lock case 10 associated with the modied lockingV assembly as shown in FIGS. 26 and 27, may be similar to the lock case 10 as shown in FIGS. 9 and 10, and presents a pair `of spaced and parallel extending guide channels 11-11 secured to the rear face 16 .of the face plate 15 and reinforced lby a side Wall 12 which is joined to adjacent guide ribs 11-11" of the spaced guide channels 11--11. 'I'he reinforcing side wall 12 has a circular window opening 12' therein through which the camming trunnions 45 and 45 and axial trunnions 44 of the primary escutcheon medallion 40 extend. 'Ihe face plate 15 of the lock case 10 is also provided with a loclsbolt receiving hole 17 through which the lockbolt 22 of the modified primary slide 29a is designed to project. j

The modified primary slide 20a as shown in FIGS. 27, 28 and 29, is preferably integrally molded from a strong and Wear-resistant plastic compound, and presents a slide block -21 having a lockbolt 22 projecting from the front face 21 thereof, and a cam arm 27 and a guide arm 29 projecting medially from the rear face 21 thereof. The slide block 21 of the primary slide Zila presents smooth end faces 2l' designed to slidably reciprocate within the guide channels ll-ll of the lock case 10, and in guided relation to the web face 1l and .guide ribs 11 thereof. The cam arm 27 presents a horizontal slide edge 27 :designed to slide along the web face 11 of the lower guide channel l1 of the lock case 1li, with its smooth side faces 27 designed to slide within a groove .lf-la extending into the modified secondary slide a. The cam arm 27 terminates in a hook portion 28 which presents a cam edge g' designed to be engaged by the camming tnunnion 45 associated with the escutcheon medallions 4t? and 5G. The guide arm 29 presents a horizontal ledge 29 which forms a continuation of the adjacent end face 2l' of the slide block 2l, and smooth side faces Z9 designed to smoothly slide within a guide groove 39 formed in the modified secondary slide 36a.

The modified secondary slide Stia may be integrally cast yor molded `from a suitable metal or a strong and wear-resistant plastic compound. The secondary slide 39a, as shown in FIG. 27, presents spaced slide shoes 32 along the upper edge thereof which presents smooth shoe faces 32 designed to slidably reciprocate within t-he upper guide channel l1; `of the lock case it?. The ends 33' of an angularly shaped leaf spring 33 are inserted hetween the spaced slide shoes 32, and its crown portion 35 is designed to slide along the web face ll `of the upper yguide channel il of the lock case. The lower horizontal edge 3ft of the secondary slide Sila is designed to slide along the web face 1l and in guided relation with the guide ribs l1 of the lower `guide channel 11 of the latch case. The angular leaf spring 33 insures smooth and non-vibratory sliding movement of the secondary latch slide 3dr: within the lock case.

The secondary slide Sil-z has a cam arm receiving groove 34a extending along the lower horizontal edge 31 thereof and which is designed to slidably receive the cam arm 27 `of the primary slide 2da, as shown in PIG. 27. The secondary slide 36a also presents a guide groove 39 designed to slidably receive the guide arm 29 of the primary slide 26a. The lfront face 35 of the secondary slide 3d has a bored hole 36' therein, designed to receive one end of a helical spring 36, and the rear `face 21" of the slide block 21 of the prima-ry slide 26a is provided with a corresponding bored hole 36 designed to receive and support the other end of the helical spring 35.

The secondary slide 3th! has a cam hole 37 extending therethrough which presents a camming rim 37', and Whose shape configuration substantially corresponds to the shape configuration of the camming rim 37 of the camming hole 37 associated with tne secondary slide 39 as shown in FIG. 9, except that the camming rim 37 of the modiied secondary slide 36a is in inverted position. It will also he noted that the cam arm receiving groove 34a in the secondary slide 39a medially intersects certain rim portions of the camming rim 37 of the secondary slide. The camming rim 37 of the secondary slide 30a presents seven cam -rim portions a, b, c, d, e, f md g as shown in IFIGS. 26 and 27, which are designed to he engaged by the camming trunnions 45 or 45 when rotated -by the associated rotatably mounted escutcheon medallions 4t) and 5% as shown in FIG. 34.

'l'he lock case it), primary slide 253m and secondary slide Sila, along with the associated leaf spring 33 and the compression spring 36, can be economically manufactured and quickly assembled together at the factory. ln assembling these components, the cam arm 27 and guide arm 29 of the primary slide 29a are respectively telescoped into the cam arm receiving groove 34a and guide groove 39 of the secondary slide Stia, and the end portions of the helical sprinfy 35 simultaneously inserted into the ybored hole 36' in the front Vface 35 of the'secondary slide Stia, and into the bored hole 36" in the rear face 21' of the slide block 2l of the primary slide 26a. The angular leaf spring 33 is applied to the secondary slide Stia, and the assembled primary and secondary slides 26a and Sila are then inserted through the rear end of the lock case l@ and in sliding relation to the guide channels lil-lll thereof. A set screw 3S is threaded into the reinforcing side wall 12 of the lock slide 1t?, and the rounded end thereof projected into a horizontally extending closed end slot 38 formed in the adjacent side face of the secondary slide lilla, to thereby maintain the secondary slide in operative position in the guide charinels ll of the lock case, as shown in FlG. 26. The set screw 38 also cooperates with the closed end slot 38 to limit the rearward movement of the secondary slide 30a, when the expanded compression spring 35 projects the lockbolt 22 in resiliently extended position, and 'when the camming ytrunnions 45 and 45 are in neutral .position as shown in FIG. 26.

The primary escutcheon medallion 4d as shown in FlGS. 30, 3l `and 34, may lbe similar to the escutcheon medallion 4d shown in FlGS. 13, 14 and 17 and previously described, and may be integrally cast to present a circular outer disc section 4l., a smaller diameter inner disc section 43, an axial trunnion d4, and a pair of diametrically opposed camming trunnions 45 and 4S', each of which presents a semi-cylindrical camming surface. A bearing stud 45 of reduced diameter projects from the inner end of each of the camniing trunnions 4.5 and 45', and a neck extension 47 projects from Kthe inner end of the axial trunnion d4. The neck extension 47 presents a peripheral groove which receives an expansion washer i3 having radially extending spring lingers 4S', and which is locked to the neck extension 47 by a split ring 49.

The secondary escutcheon medallion 5d, as shown in FIGS. 32, 33 and 34, may he similar to the escutcheon medallion shown in FIGS. l5, 16 and 18, and presents on outer circular disc section 5f. and an inner circular disc section 53. The inner disc section 53 presents an axial hole 54 designed to receive the stud extension 47 associated `with the primary escutcheon medallion 40, and its rough interior wall is designed to interlock with the resilient lingers of the locking washer e8 secured to the end extension 47 of the axial trunnion 4d of -the primary escutcheon medallion 4t?. The inner face of the inne-r disc 53 is also provided with diametrically opposed socket holes 55 designed to receive the bearing studs le extending from the camming trunnions 45 and 45 of the primary escutcheon medallion di?. A handle l'oar 56, formed as shown in FIG. l5 may lbe secured to the outer face of the outer disc Asection 5l of the escutcheon medallion, or alternatively, a handle knob 56a may lhe lsecured to the outer disc section 51 to thereby rotate the escu-tcheon medallions 49 and Sil.

The paired escutcheon medallions It@ and 5! as shown in FIGS. 13-18, or the paired escutcheon medallions 4G' and 5t? as shown in FlGS. '3G-34, are rotatably supported `by seating rims xed to or forming a part of the door side walls. Where -the door body B is formed of metal or plastic facing panels 2 2 as indicated in FG. 18, the facing panels of the door body may be provided with depressed seating rims 42 and S2 as shown in FIG. 18, which are formed lby first cutting a circular hole in the facing panels, and then shaping the peripheral edge portion surrounding the hole to provide circular rim walls 42, 52 and inturned seating lips 42"-52 against which the inner `faces of the outer disc sections il and S1 of the respective escutcheon medallions are seated.

The outer disc sections il-51 of the escutcheon medallions dt- Sd may also be rotatably supported by a pair of independent seating rims, each shaped in the form of a seating ring 5S as shown in FIG. 34. Each seating ring 58 presents an outwardly extending ilange portion 58 designed to Ibe secured as by screws or other suitable means to the adjacent cuter faces of the door body, and

l an inset ledge portion 58 within which the outer disc sections 41 or 51 of the escutcheon medallions are rotatably supported.

In assembling the escutcheon medallions 4G and 50 to the door lbody in operative association with the primary and secondary slides 29a and 36a, the camming trunnions 45 and 45 are inserted through the camming hole 37 of the secondary slide and with the camming trunnion 45 lowermost as shown in FIGS. 26 and 34. The secondary escutcheon medallion 5) is then applied, and inward pressure exerted on the primary and secondary escutcheon medallions 40 and 50 to spring the locking washer 4S carried by the axial extension 47 into locking engagement with its axial hole n54 of the secondary medallion 50.

'As thus made and assembled, the modified door locking assembly shown in FIGS. 26-34 operates in the same manner as the door locking assembly illustrated in FIGS. 19, 2l, 23 and 25. When the camrning trunnions 45 and 45 of the modified locking assembly are in neutr-al position as shown in FlG. 26, the neutral cam rim portion a of the secondary slide 39a is in bearing contact with the lower camming trunnion 45, and the neutral cam rim portion d is in contact with the upper camming trunnion 45. The camming edge g of the cam arm 27 of the primary slide 26o is also in abutment against the lower camming trunnion `45, and the expanded spring 36 maintains the front face 2-1" of the slide block 21 of the primary slide a in abutment against the inner face 116 of the face plate 15, with the lockbolt 22 associated therewith in resiliently projecting position, as shown in FIG. 26.

When the lockbolt 22 is depressed as a result of camming engagement with the cam face 102 of the doorframesupported keeper plate C in the manner shown in FIG. 6, the spring 36 is compressed and the hook portion 28 of the cam arm 27 is moved rearwardly out of contact with the camming trunnion `45, in the manner indicated in FIG. 21. When the door is fully closed, the lockbolt 22 is projected outwardly and into the lockbolt hole 101 of the dorframe-supported keeper plate C, without disturbing the neutral position of the camming trunnions 45 and When the door is closed and ready to be locked, the camming trunnions 45 and 45 as shown in FIG. 26 are rotated in a clockwise direction for a distance of approximately ninety degrees, so that the camming trunnion 45 is in bearing contact with the locking cam rim portion b of the secondary slide Stia, and the camming trunnion 45' is moved to a position adjacent the locking cam rim portion e and into abutment against the cam rim portion of the secondary slide 30a. This ninety degree rotative movement of the camming trunnions 45 and 45 advances the front face of the secondary slide 30a substantially into abutting relation to the rear face 21 of the slide block 21 of the primary slide 20a, which operation com-` presses the spring 36 and rigidly maintains the lockbolt 22 in rigidly extended position.

When the door is to be unlocked by retraction of the lockbolt 22, the camming trunnions 45 and 45 are manually rotated counter-clockwise to the neutral position shown in FIG. 26, and then further rotated in a counterclockwise direction for a distance of approximately fortyiive degrees, so that the lower camming trunnion 45 as shown in FIG. 26 engages and drives the cam edge g of the cam arm 27 of the primary slide 20a rearwardly, to thereby compress the spring 36 and forcibly retract the lockbolt 22 into unlocking position. In the same unlocking operation, the camming trunnion 45 is moved to a position adjacent the limit-stop cam portion c of the secondary slide 30a, which prevents further rearward movemeut of the secondary slide 30a. When the lockbolt 22 is thus manipulated into retracted position, the door can be opened. When the handle bar 56 or handle knob 56a is manually released, the compression spring 36 expands to again project the lockbolt 22 from unlocking position into resiliently extended position, and the cam arm 27 of the primary slide 20o is also driven forwardly by expension of the spring 36 so that its hook portion 28 engages and returns the camming trunnion 45 to neutral position.

Door locking assemblies -made in accordance with this invention are uniquely adapted for association with relatively thin doors and thin doorframe-forming posts or pilasters used in dividing interior building space into cubicle compartments, as shown in FIGS. l and 4. For purposes of illustration, FIGS. l and 4 show one form of hollow metal door B with which the door locking struc' ture A of this invention may be associated, and which is composed of a pair of spaced facing panels 2 2 presenting inturned flanges 3 along the vertical and horizontal edges thereof, and which terminate in outwardly ared lip portions 4 as shown in FIG. 4. The facing panels 2 2 may be braced and stiffened by sound deadening and reinforcing insulation 5, which is placed in position when the facing panels 2 2 are assembled together. Semi-tubular edging strips 6, presenting inturned flange portions 7, are telescoped over the outwardly flared lip portions 4 4 to interlock therewith. Suitable reinforcing brackets 8 are secured to the rear edge of the door body, and through which hinge pintles 8 extend for swingably supporting the doorframe on the adjacent post or pilaster D.

The front jamb edge of the door body B is provided with a receiving pocket 9 as shown in FIG. 4, through which the guide channels 11 11 of the lock case 10, and the primary and secondary slides supported therein, are inserted, and with the laterally extending bosses 13 in bracing relation against the inner surfaces of the facing panels 2 2. A conforming hole is cut in the inturned flanges 3 to permit insertion of the guide channels 11 of the lock case into the door pocket 9, and the outer faces of the adjacent inturned flange portions 3 provideV seating support for the rear faces 16 ofthe end extensions of the facing plate 15 of the lock case. The facing plate 15 may be secured in position by providing a locking tongue 18 projecting from each end of the body section 16 of the face plate as shown in FIG. l0, or by alternatively providing a pair of spaced locking studs 19 projecting from each end of the body section 16 of the facing plate 15 as shown in FIG. 27, and over which the adjacent ends of the semi-tubular edging strips 6 are telescoped to secure the face plate 15- in rigid position to the jamb edge of the door body without visible securing means.

The face plate 15 of the lock case 10 presents a body section 16 whose end extensions project beyond the guide channels 11 11 thereof, and these end extensions presen-t rear face portions 16" designed to seat against the jamb edge or adjacent flange portions 3 3 of the door body. The intermediate rear face portion 16' of the body section 16, which extends between the guide channels 11 11, provides an abutment face against which the front face 21" of the Vslide block 21 of the primary slide 20 orV 20a is designed to abut. The side faces of the door body have circular holes formed therein which open into the lock case receiving pocket 9 of the door body. Seating rims 42-52 as shown in FIG. 18 may be formed in the outer peripheries of these circular holes, or the circular holes may be rimmed by seating rings 58 as shown in FIG. 34, and which provide a seating'journal in which the outer disc sections 41 and 51 of the escutcheon medallions 40 and 50 are rotatably journaled.

The front face of the body section 16 of the face plate 15 is preferably provided with a depressed area 17 in surrounding relation to the lockbolt receiving hole 17 therein, to provide swinging clearance for the door stop elements 193 of the keeper struc-ture C mounted on the jamb edge of the adjacent post or pilaster D. Outer face portions 17" of the body section 16 may be contoured in streamline symmetry with exposed faces of the semitubular edging strips 6 which extend above and below the body section 16 of the face plate 15. The base end of each locking tongue 18 extending from each e-nd of the face plate body section 16, presents inner and outer shoulders 1S against which the terminal end of the adjacent edging strips 6 is designed to abut, and to form a ilush and single line joint therebetween. Paired locking studs 19 as shown in FIGS. 26 and 27, and which extend from the opposite ends of the face plate body section 16, may be alternatively used in place of the locking tongues 18, and the base ends of the locking studs 19 also present inner and outer abutment shoulders 19' against which the adjacent ends of the semi-tubular edging strips 6 which telescope thereover, are designed to abut to provide a single line joint between the contoured outer face portions 17" of the face plate body section and the outer face of the semi-tubular edging strip.

In the cubicle compartment shown in FlGS. 1 and 4, the doorframe for .the door body B is provided by the vertical jamb edges of a pair of adjacent posts or p=i lasters D and D'. For purpose of illustration, the door supporting hinging pilaster D', and the opposite pilaster D which supports the keeper structure C, may be similarly formed from a pair of facing panels i12-112 presenting inturned ilanges 113-113 lalong the exposed vertical and horizontal edges thereof, and which terminate in outwardly ared lip portions 114 as shown in FIG. 4. The facing panels i12-112 may be braced and stilened by sound deadening and reinforcing insulation 115 which is placed in position when the facing panels 112-112 are assembled together. Semi-tubular edging strips 11e-116 presenting inturned ange portions 117 are telescoped over the outwardly flared lip portions 114-114 to interlock therewith. Each of the doorframe-forming pilasters D and D may be door supported or ceiling suspended from the horizontal floor wall or the horizontal ceiling wall of the building, and secured thereto by pilaster mounting assemblies (not shown) contained within a telescopic concealing shoe 118. The door ksupporting piiaster D is provided with suitable hinge brackets 119 extending from the doorframe-forming jamb edge thereof, and which provides support for the hinge pintles 'S' on which the door body is swingably mounted.

The body section 19d of the keeper structure C presents a relatively at rear face designed to seat against the inturned anges 113 of the pilaster body D, and has an anchoring lug 1M, shaped as shown in FlGS. -8, which is telescoped into a conforming hole formed in the inturned iianges 113-113 of the pilaster body and which anchors the keeper structure C in tixed position. The keeper structure C may be further maintained in rigidly fixed position by the provision of a locking tongue 105 extending from each end of its body section 160, and over which the adjacent ends of the upper and lower semi-tubular edgino strips 116-116 are designed to snugly telescope to thereby lock the keeper structure in xed position. The keeper structure C is designed to be reversibly mounted to present its door stop element 1133 on either side of the pilaster body D. For example, the keeper structure C may be mounted on the pil-aster body D to present its door stop element 193 on the left hand side of the door body shown in FIG. 3, by an end-to-end reversal of the keeper structure when mounted on the jamb edge of Athe door body.

The terminal end 103' of the door stop element 103 need project only approximately one-eighth of an inch beyond the end of the inclined cam face 102 of the keeper structure, and iu no case exceeding one-quarter inch, to provide an adequate stop for the lockbolt 22 associated with the door mounted locking structure A. The depressed front face portion 17 which surrounds the lockbolt receiving hole 17 in the face plate `15, may be correspondingly depressed approximately one-eighth inch to provide swinging clearance for the terminal end portion 103 of the door stop element 163 of the keeper structure C. As thus constructed, the jamb face forming edging strips 6 extending above and below the body section 16 of the door mounted face plate 15, may be positioned closely adjacent the edging strips 116 extending above and below vthe body section of the pilaster mounted keeper structure C, so that a minimal clearance space between the swinging edge of the door body and the doorframe-forminv edge of the pilaster D is attained.

It will be further noted that the body section 10) of the keeper structure C is confined within the jamb edge of the supporting pilaster D, and that no part of the keeper structure C -overlaps the side faces of the pilaster body. Dirt collecting projections are thus substantially eliminated. The door stop element M33 presents a rounded outer face and rounded upper and Ilower ends, and since its projecting terminal end ltl/ extends only slightly beyond the inclined cam face 162 of the keeper structure, any possi-bility that the clothing of a person leaving or entering the cubicle may be caught thereon, is avoided.

The keeper structure C may be cast or molded as an integral unit from a `suitable metal or a strong and wear-resistant plastic compound, and if cast from metal its exposed faces may be plated with a bright metal. The lockbolt 22 associated with the locking structure A is preferably made from a strong and wear-resistant plastic compound, and when so made, the lockbolt will strike quietly and with little noise agmhst the inner face of the door stop element .103 of the keeper structure when the door is closed; and when so made, the inner face of the door stop element 1133 of the keeper structure requires no resilient sound deadening padding.

While'certain novel features of this invention have been disclosed herein and are pointed out in the claims, it will be understood that various omissions, substitutions, and changes may be made by those skilled in the art without departing from the spirit of this invention.

What is claimed is:

1. A door locking structure including in combination; a lock case presenting a face plate having a lockbolt hole therein designed t-o be secured to the jamb edge of a door body, and a case section extending from said face pla-te and designed for insertion into the door body; a primary slide lreciprocably supported in the case section of the lock case, said primary slide including a forwardly projecting lockbolt designed to extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting cam member presenting a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the `lock case, resilient means extending between said primary and secondary slides, and a camming hole presenting a camming rim extending through said secondary slide; yand slide manipulating means rotatably mounted on the door body which includes, a camming element extending into the camrning hole of said secondary slide, and external means for manually rotating said camming element in opposite directions from a neutral position, said camming element being normally maintained in neutral position and said lockbolt in resiliently projected position by expansion of said resilient means, said camming element being operative to cam against a cam rim portion yof said secondary slide when manually rotated in one direction from neutral position to thereby advance said secondary slide in a direction towards said primary slide with accompanying compression of said resilient means which thereupon maintains .the lockbolt of the primary slide in rigidly projected locking position, said camming element being manually rotatable in the opposite direction from locking position to neutral position to thereby permit expansion of said resilient means which thereupon returns the lockbolt of the primary slide to resiliently projected position, said camming element 19 being further manually rotatable in the opposite direction from neutral position to thereby `drive the cam edge portion of the primary slide in a rearward direction and to correspondingly forcibly retract the lockbolt of said primary slide from resiliently projected position to door unlocking retracted position with accompanying compression of said resilient means; said camming element being automatically returned to neutral position with accompanying return of said lockbolt from manually retracted position to resiliently projected position by expansion of said resilient means when said camming element is manually released.

2. A door locking structure including in combination; a lock case presenting `a face plate having a lockbolt hole therein designed -to be secured to the jamb edge of a door body, and a case section extending from said face plate and designed for insertion into the door body; a primary slide which includes, a body section reciprocably supported in the case section of the lock case, a lockbolt projecting forwardly from said body sect-ion and designed to extend through the lockbolt hole in the face plate of the lock case, and la cam member projecting rearwardly from said body section which presents a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported by the case section of the lock case, a resilient spring extending between and supported by said secondary slide and the body section of said primary slide, and a camming hole presenting a camming rim extending through said secondary slide; and slide manipulating means rotatably mounted on the door body which includes, a camming element extending into the camming hole of said secondary slide, and external means for manually rotating said camming element in opposite directions from a neutral position, said camming element being normally maintained in neutral position and said lockbolt in resiliently projected position by expansion of said resilient spring, said camming element being operative to cam .against a cam rim portion of said secondary slide when manually rotated in one direction from neutral position to thereby advance said secondary slide in a direction towards said primary slide with accompanying compression of said resilient spring which thereupon mainmains the lockbolt of the primary slide in rigidly projected locking position, said camming element being manually rotatable in the opposite direction from locking position to neutral position to thereby permit expansion of said resilient spring which thereupon returns the lockbolt of the primary slide to resiliently projected position, said camming element being further manually rotatable in the opposite direction from neutral position to thereby drive the cam edge portion of the primary slide in a rearward direction and to corresponding forcibly retract the lockbolt of said primary slide from resiliently projected position to door unlocking retracted position with accompanying compression of said lresilient spring; said camming element being automatically returned to neutral position with accompanying return of said lockbolt from manually retracted position to resiliently projected position by expansion of said resilient spring when said camming element is manually released.

3. A door locking structure including in combination; a lock case presenting a face place having a lockbolt hole therein designed to be secured to the jamb edge of a door body, and a case section extending from said face plate and designed for insertion into the door body; a primary slide reciprocably supported in the case section of the lock case, said primary slide including a forwardly extending lockbolt designed to extend through the lockbolt hole in the face plate of the -lock case, and a rearwardly projecting member presenting a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the lock case, resilient means extending between said primary and secondary slides, and a camming hole extending through said secondary slide 2G i and presenting a neutral cam rim portion and a locking cam rim portion; and slide manipulating means rotatably mounted on the door body which includes, `a camming element extending into the camming hole of said secondary slide, and external means for manually rotating said camming element in opposite directions from a neutral position; said resilient means being operative to normally maintain said neutral cam rim portion of the secondary slide and the cam edge portion of said primary slide in resilient abutment against opposite sides of said camming element to thereby resiliently maintain said camming element in neutral position and said lockbolt in resiliently projected position; said camming element being operative to cam against said locking cam rim portion of the secondary slide when manually rotated in one direction from neutral position to locking position to thereby advance said secondary slide in a direction towards said primary slide, with corresponding compression of said resilient means, and maintain the lockbolt of the primary slide in rigidly projected locking position; said camming element being manually rotatable in the opposite direction from locking position to neutral position to thereby permit expansion of said resilient means which thereupon operates to maintain the locking bolt of the primary slide in resiliently projected position with the camming edge portion of the primary slide in resilient abutment against said camming element; said camming element being further manually rotatable in the opposite direction from neutral position to thereby drive the cam edge portion of the primary slide in a rearward direction to correspondingly forcibly retract the lockbolt of said primary slide from resiliently projected position to door unlocking -retracted position and to correspondingly compress said resilient means; said resilient means being operative to automatically return said camming element from lockbolt-retracting position to neutral position when said camming element is manually released.

4. A door locking structure including in combination; a lock case presenting a face plate having a lockbolt hole therein designed to be secured to the edge of -a door body, a pair of spaced -and substantially parallel guide members extending from said face plate and designed for insertion into the door body; a primary slide extending between and reciprocably supported by the guide members of the lock case, said primary slide including a forwardly extending lockbolt designed to extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting member presenting a lockbolt-reacting cam edge portion; a secondary slide extending between and reciprocably supported by the guide members of the lock case, resilient means extending between said primary and secondary slides, and a camming hole extending through said secondary slide and presenting a series of cam rim portions; and slide manipulating means rotatably mounted on the door body which includes, a camming trunnion extending through the camming hole in said secondary slide, and external means for manually rotating said camming trunnion in opposite directions from a neutral position; said resilient means being operative to normally maintain a first cam lrim portion of said secondary slide and the cam edge portion of said prim-ary slide in resilient abutment against opposite sides of said camming trunnion to thereby resiliently maintain said camming trunnion in neutral position and said lockbolt in resiliently projected position; said camming trunnion being operative to cam against a second cam rim portion of said secondary slide when manually rotated in one direction from neutral position to locking position to thereby advance said secondary slide in a direction towards said primary slide, to correspondingly compress said resilient means, and to maintain the lockbolt of the primary slide in rigidly projected locking position; said camming trunnion being manually rotatable in the opposite direction from locking position to neutral position to thereby permit expansion of said resilient means which thereupon operates to maintain the locking bol-t of the primary slide -in resiliently projected position with the camming edge portion of the primary slide in resilient abutment against said camming trunnion; said camming trunnion being further manually rotatable in the opposite direction from neutral position to thereby drive the cam edge portion of the primary slide rearwardly and correspondingly -forcibly retract the lockbolt of said primary slide from resiliently projected position t-o door unlocking retracted position and to correspondingly compress said resilient means; said resilient means being operative to automatically return said camming trunnion -from lockbolt-retracting position to neutral posi- `tion when said camming tnmnion lis manually released.

5. A door locking structure including in combination; va lock case presenting a face plate having a lockbolt hole therein designed to be secured to the edge .of a door body, -a pair of spaced and substantially parallel guide members extending from said face plate and designed for insertion `into the door body; a primary slide presenting a slide block extending between and reciprocably supported by the guide members of the lock case, a lockbolt iixed to and projecting forwardly from said slide block and designed to extend through the lockbolt hole in the 4face plate of the lock case, and a cam arm extending rearwardly from said slide block and having a cam slot therein which presents a lockbolt-retracting cam edge portion; a secondary slide extending between and reciprocably supported by the guide members of the lock case, a resilient spring extending between and supported by the secondary slide and the slide block of the primary slide, a guide groove in said secondary slide which receives the cam arm `of said primary slide, a camming hole extending through said secondary slide and which presents a camming rim which at least partially exposes the cam edge portion of said primary slide; and slide manipulating means which includes a rotatably mounted camming element extending into the camming hole of said secondary slide and which is designed to be rotated into camming engagement with lthe camming n'rn of said secondary slide when rotated in one direction and into camming engagement with the cam edge portion of said primary slide when rotated in the opposite direction, and means for manually rotating said camming element in opposite directions from a neutral position to thereby manipulate said lockbolt into rigidly extended door-locking position when said camming element is rotated in one direction from neutral position, and -to manipulate said lockbolt to door-unlocking retracted position when rotated in the opposite direction from neutral position.

6. A door locking structure including in combin-ation; a lock case presenting a Vface plate having a lockbolt hole 'therein designed to be secured to the edge of a door body, a case section extending from said face plate and designed for insertion into the door body; a primary slide presenting ya slide block reciprocably supported by the case section of the lock case, a lockbolt fixed -to and projecting forwardly from said slide block and designed to extend through the lockbolt hole in the face plate of the lock case, and a cam arm extending rearwardly from said slide block and having a Acam slot therein which presents a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported by the case section of the lock case, .fa resilient spring extending between and supported :by the secondary slide and the slide block of the primary slide, a guide groove in said secondary slide which receives the cam arm of the primary slide, a camming hole extending through said secondary slide and which presents a camming rim which at least partially exposes the cam edge portion of said primary slide, and means for limiting the reciprocating movement of said secondary slide; and slide manipulating means which includes a rotatably mounted camming element extending into the camming hole of said secondary slide and which is designed to be rotated into camming engagement with the camming rim of said secondary slide when rotated in one direction and into camming engagement with the cam edge portion of said primary slide when rotated in the opposite direction, and means for manually rotating said camming element in opposite directions from a neutral position to thereby manipulate said lockbolt into rigidly extended door-locking position when said camming element is rotated in one direction from neutral position, and to manipulate said lockbolt to door-unlocking retracted position when rotated in the opposite direction from neutral position; said resilient spring -being operative -to manipulate the loclcbolt into resiliently projected position when said camming element is in neutral position.

7. A door locking structure including in combination; a lock case presenting -a `tace plate having a lockbolt hole therein designed to be secured to the edge of a door body, a case section extending from said face plate and designed `for insertion into the door body; a primary slide presenting a slide block reciprocably supported in the case section of the lock case, a lockbolt fixed to rand projecting forwardly from said `slide block :and designed to extend through the lockbolt hole in the yface plate of the lock case, a guide arm extending rearwardly from said slide block, and a cam arm extending rearwardly from said slide block and having a cam slot therein which presents a lockbolt-retracting cam edge portion; a secondary 4slide reciprocably supported in the case section of the lock case, la resilient spring extending between and supported by the secondary slide and the slide block of the primary slide, a guide groove in said seconda-ry slide which receives the guide arm of said primary slide, a guide groove in said secondary slide which receives the cam arm of said primary slide, a camming hole extending through said secondary slide and which presents a camming rim which at least partially exposes the cam edge portion of said primary slide; and slide manipulating means which includes a rotatably mounted camming element extending into the camming hole of said secondary slide and which is designed to be rotated into camming engagement with the camming rim of said secondary slide when rotated in one direction and into camming engagement with the cam edge portion of said prima-ry slide when rotated in the opposite direction, and means for manually rotating said carnming element in opposite directions from a neutral position to thereby manipulate said lockbolt into rigidly -extended door-locking position when said camming element is rotated in one direction from neutral position, `and to manipulate said lockbolt t0 door-unlocking retracted position when rotated in the opposite direction from neutral position; said resilient spring being operative to resiliently maintain said lockbolt in resiliently projected position when said camming element is in neutral position.

8. A door locking structure including in combination; a lock case presenting a face plate having a lockbolt hole therein designed to be secured to the edge of a door body, a case section extending from said face plate and designed for insertion into the door body; a primary slide reciprocably supported in the case section of the lock case and having a forwardly projecting lockbolt designed to extend through the Ilockbolt hole in the face plate of the lock case, and a rearwardly project-ing cam arm having a cam slot therein which presents a lockbolt-retracting cam edge portion; -a secondary slide reciprocably supported in the case section of the lock case, a resilient spring extending between said primary land secondary slides, a guide groove in said secondary slide which receives the cam arm of said primary slide, a camming hole extending through said secondary slide and which presents a camming rim which at least partially exposes the cam edge portion yof said primary slide; and slide manipulating means including a pair of escutcheon medallions designed to be rotatably mounted on the door body, ya carnming element extending between and rotatable with said escutcheon medallions, and external means for manually rotating said escutcheon medallions and said camming element in opposite directions from a neutral position,

said camming element being operative to manipulate said` 9. A door locking structure including in combination;

a lock case presenting a face plate having a lockbolt hole therein designed'to be `secured to the edge of a door body, a case section extending from said face plateand designed for insertion into the door body; `a primary slide reciprocably supported in the case section of the lock case and having a forwardly projecting lockbolt designed to extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting cam arm having a cam slot therein which presents a lockbolt-retracting cam edge portion; a secondary slide preciprocably supported in the case section `of the lock case, a resilient spring extending between said primary and secondary slides, -a guide groove in said secondary slide which receives the cam arm of said primary slide, a camming hole extending through said secondary slide and which presents a camming rim which at least partially exposes the cam edge portion of said primary slide; and slide manipulating means including a pair of escutcheon medallions designed to be rotatably mounted on the door body, an -axial shaft connecting `said escutcheon medallions, a camming element extending between said escutcheon medallions and through the camming hole in said secondary slide, and external means for manually rotating said escutcheon medallions and said camming element in opposite directions Ifrom a neutral position, said camming element being operative to manipulate said lockbolt into rigidly extended door-locking position when said camming element is rotated in one direction from neutral position, and to manipulate said lockbolt to door-unlocking retracted position when rotated in the opposite direction from neutral position, said resilient spring being operative to maintain said lockbolt in resiliently extended position when said camming element is in neutral position.

10. A door locking structure including in combination; a lock case presenting a face plate having a lockbolt hole therein designed to be secured to the edge of a door body, a case section extending from said `face plate `and designed for insertion into the door body; a primary slide reciprocably supported in the case section of the lock case and having :a vforwardly projecting lockbolt designed to extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting cam arm having -a cam slot therein which presents a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the lock case, a resilient spring extending between said primary and secondary slides, a guide groove in said secondary s-lide which receives the cam arm of said primary slide, a camming hole extending through said secondary slide and which presents la camming rim which at least partially exposes the cam edge portion of said primary slide; and slide manipulating means including a pair of escutcheon medallions designed to be rotatably mounted on the door body, :an axial shaft connecting said escutcheon medallions, diametrically opposed camming trunnions extending between said escutcheon medallions and through the camming hole in said secondary slide, and external means for manually rotating said escutcheon medallions and said camming trunnions in opposite directions from a neutral position, said camming tnmnions being operative to manipulate said lockbolt into rigidly extended door-locking position when said camming trunnions are rotated in one direction from neutral position, and to manipulate said lockbolt to door-unlocking retracted position when rotated in the opposite direction from neutral position, said` lresilient spring being operative to maintain said loclcbolt in resiliently extended position when said camming trunnions are in neutral position.

l1. A door locking Vstructure including in combination;

a lock case presenting `a face plate having a lockbolt hole hole therein designed to be secured to the edge of a door' body, a case section extending from said face plate and designed for insertion into the door body; `a primary slide' reciprocably supported in the case section of the lock casel and having a forwardly projecting lockbolt designed to' extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting cam arm having a cam slot therein which presents a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the lock case, a resilient spring extend-4 secondary slide, and external means for manually rotatingsaid escutcheon medallions and camming element in opposite directions from a neutral position; said resilient spring being operative to resiliently maintain said lockbolt in resiliently projected position when said camming element is in neutral position, and to also maintain a first cam rim portion of said secondary slide and the cam edge portion of said primary slide in resilient abutment against opposite sides of said camming element to thereby resiliently maintain said camming element in neutral position; said camming element being operative to cam against a second cam rim portion of said secondary slide when manually rotated in one direction for a distance of approximately ninety degrees from neutral position to therebyadvance said secondary slide in a direction towards said primary slide and correspondingly compress said resilient spring and maintain the lockbolt of the primary slide in rigidly projected locking position; said camming elementy being manually rotatable in the opposite direction fromlocking position to neutral position to thereby permit expansion of said resilient spring which thereupon operates to maintain the lockbolt of the primary slide in resiliently projected position with the camming edge of the cam arm of the primary slide in resilient abutment against said camming element; said camming element being further manually rotatable in the opposite direction from neutral position whereby said camming element engages the cam edge portion of said primary vslide to thereby drive said primary slide rearwardly to forcibly retract the lockbolt of said primary slide from resiliently projected position to door-unlocking retracted position and accompanied by corresponding compression of said resilient spring; said resilient spring being operative to automatically return said camming element from lockbolt-retracting position to neutral position when said camming element is manually released.

12. A door locking structure including in combination; a lock case presenting a face plate having a lockbolt hole therein designed to be secured to the edge of ladoor body, a case section extending from said face plate and designed for insertion into the door body; a primary slide reciprocably supported in the case section of the lock case and having a forwardly projecting lockbolt designed to extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting cam arm having a cam slot therein which presents a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the lock case, a resilient spring extending between said primary and secondary slides, a guide groove` in said secondary slide which receives the cam arm of said primary slide, a camming hole extending through said secondary slide yand which presents a camming rim which at least partially exposes the cam edge portion of said primary slide; and slide manipulating means including a pair of escutcheon medallions rotatably mounted on the door body, an axial shaft connecting said escutcheon medallions, diametrically opposed camming trunnions extending between said escutcheon medallions and through the camming hole in said secondary slide, and external means for manu-ally rotating said escutcheon medallions and said camming trunnions in opposite directions from a neutral position; said resilient spring being operative to resiliently maintain said lockbolt in resiliently projected position when said camming trunnions are in neutral position, and to also maintain a tirst cam rim portion of said secondary slide and the cam edge portion of said primary slide in resilient abutment against opposite sides of one of said camming trunnions to thereby resiliently maintain said camming trunnions in neutral position; one of said camming trunnions being operative to cam against a second cam rim portion of said secondary slide when manually rotated in one direction for a distance of approximately ninety degrees from neutral position to thereby advance said secondary slide in a direction towards said primary slide and correspondingly compress said resilient spring and maintain the lockbolt of the primary slide in rigidly projected locking position; said camming hole in said secondary slide also presenting an abutment forming cam rim portion against which said companion camming trunnion is designed to yabut to thereby prevent further rotative movement of said camming trunnions when locking position is reached; said camming trunnions being manually rotatable in the opposite direction from locking position to neutral position to thereby permit expansion of said resilient spring which thereupon operates to maintain the lockbolt of the primary slide in resiliently projected position with the camming edge of the cam arm of the primary slide in resilient abutment against one of said camming trunnions; said camming trunnions being further manually rotatable in the opposite direction from neutral position whereby said cam arm engaging trunnion operates to draw said cam arm rearwardly to thereby forcibly retract the lockbolt of said primary slide from resiliently projected position to door-unlocking retracted position and correspondingly compress said resilient spring; said resilient spring being operative to automatically return said camming trunnions from lockbolt-retracting position to neutral position when said camming trunnions are manually released.

13. A door looking assembly including in `combination, a door locking structure designed for association with a door body and a keeper structure designed for association with an adjacent door frame; said door looking structure including, a lock case presenting a face plate having a lockibolt hole therein designed to be secured to the jamb edge of a door body, and a case section extending from said face plate and designed for insertion into the door body; a primary slide reciprocably supported in the case section of the lock case, said primary slide including a forwardly projecting lockbolt designed to extend through the lockbolt hole in the face plate of the lock case, and a rearwardly projecting cam member presenting a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the lock case, resilient means extending between said primary and secondary slides, and a camming hole presenting a camming rim extending through Said secondary slide; and slide manipulating means rotatably mounted on the door 'body which includes, a camming element extending into the camming hole of said secondary slide, and external means for manually rotating said camming element in opposite directions from a neutral position, said ycamming element being normally maintained in neutral position and said lockibolt in resiliently projected position by expansion of said resilient means, said camming element being operative to cam against a cam rim portion of said secondary slide when manually rotated in one direction from neutral position to thereby advance said secondary slide in a direction towards said primary slide with accompanying compression of said resilient means which thereupon maintains the lockbolt of the primary slide in rigidly projected locking position, said camming element being manually rotatable in the opposite direction from locking position to neutral position to thereby permit expansion of said resilient means which thereupon returns the lockbolt of the primary slide to resiliently projected position, said camming element being further manually rotatable in the opposite direction from neutral position to thereby drive the cam edge portion of the primary slide in a rearward direction and to correspondingly forcibly retract the lockbolt of said primary slide from resiliently projected position to door-unlocking retracted position with accompanying compression of said resilient means, said camming element being automatically returned to neutral position with accompanying return of said lockbolt from manually retracted position to resiliently projected position by expansion of said resilient means when said camming element is manually released; said keeper structure having a :body section designed to be mounted on the jarnb edge of a ldoor frame, said body section presenting a lockbolt receiving pocket designed to receive the end portion of the lockbolt when in extended position, an inclined cam face leading to and on one side of said lockbolt receiving pocket, and a doorstopelement presenting an abutment face substantially in alignment with the other side of said lockbolt receiving pocket and against which one side of the loclebolt is designed to abut when said lockbolt is in retracted position, the lockbolt of said door locking structure presenting a rounded end designed to cam over the inclined cam face of said keeper structure when said loclcbolt is in resiliently extended position and to plunge into said receiving pocket when the door has Ibeen swung into closed position.

14. A door locking structure including in combination; a 'lock case presenting a face plate having a lockbolt hole therein designed to :be secured to the jamb edge of a door body, and a case section extending from said face plate and designed for insertion into the door body; a primary slide reciprocably supported in the case section of the lock case, said primary slide including a forwardly projecting lockbolt designed to extend through the lookbolt hole in the face plate of the lock case, and a rearwardly projecting cam member presenting a lockbolt-retracting cam edge portion; a secondary slide reciprocably supported in the case section of the look case, resilient means extending between said primary and secondary slides, and a camming hole presenting a camming rim extending through said secondary slide; and slide manipulating means which includes a rotatably mounted camming element extending into the camming hole of said secondary slide and which is designed to :be rotated into camming engagement with the camming rim of said `secondary slide when rotated in one direction and into camming engagement with the cam edge portion of said primary slide when rotated in the opposite direction, and means for manually rotating said camming element in opposite `directions from a neutral position to thereby manipulate said lockbolt into rigidly extended door-locking position when said camming element is rotated in one direction vfrom neutral position, and to manipulate said lockibolt to door-unlocking retracted position when rotated in the opposite direction from neutral position.

l5. A `door locking structure including in combination; a lock case presenting a face plate having a lockbolt hole therein designed to be secured to the jamb edge of a door body, and a case section extending from said face plate and designed `for insertion into the door body; a primary slide which includes, a body section in the face plate of the lock case, and aV camimemberV projecting rearwardly `from said body sectionlwhich presents a lock-bolt-retracting cam edge portion; 'a secondary slide reoiprocably supported 'by the case section of the lock case, a resilient spring extending between and supported by said secondary slide and the body section 0f said primary slide, and a camming hole presenting a cammng rim extending through said secondary slide; and slide manipulating means which includes a rotatably mounted camming `element extending into the camming hole of said secondary slide and which is designed to be rotated into camming engagement with the camming rim of said secondary slide when rotated in one direction and into camming engagement with the cam edge 28 portion of said primary slide when 'rotated in the opposite direction, and means for manual-ly rotating said camming element in opposite directions from a neutral position to thereby manipulate said lookbolt into rigidly extended door-locking position when said camming elel ment is rotated in one direction from neutral position,

and to manipulate sai-d lockbolt to door-unlocking Vretracted position when rotated in the opposite direction from neutral position; said resilient spring being operatiye to manipulate the lockbolt into resiliently projected position when said camming element is in neutral position.

References Cited in the tile of this patent UNITED STATES PATENTS 1,463,385 Butterworth July 31, 1923 2,253,496 Cordrey et al Aug. 26, 1941 2,631,878 Backhouse Mar. 17, 1953 2,876,873 Benham Mar. 10, 1959 

14. A DOOR LOCKING STRUCTURE INCLUDING IN COMBINATION; A LOCK CASE PRESENTING A FACE PLATE HAVING A LOCKBOLT HOLE THEREIN DESIGNED TO BE SECURED TO THE JAMB EDGE OF A DOOR BODY, AND A CASE SECTION EXTENDING FROM SAID FACE PLATE AND DESIGNED FOR INSERTION INTO THE DOOR BODY; A PRIMARY SLIDE RECIPROCABLY SUPPORTED IN THE CASE SECTION OF THE LOCK CASE, SAID PRIMARY SLIDE INCLUDING A FORWARDLY PROJECTING LOCKBOLT DESIGNED TO EXTEND THROUGH THE LOCKBOLT HOLE IN THE FACE PLATE OF THE LOCK CASE, AND A REARWARDLY PROJECTING CAM MEMBER PRESENTING A LOCKBOLT-RETRACTING CAM EDGE PORTION; A SECONDARY SLIDE RECIPROCABLY SUPPORTED IN THE CASE SECTION OF THE LOCK CASE RESILIENT MEANS EXTENDING BETWEEN SAID PRIMARY AND SECONDARY SLIDES, AND A CAMMING HOLE PRESENTING A CAMMING RIM EXTENDING THROUGH SAID SECONDARY SLIDE; AND SLIDE MANIPULATING MEANS WHICH INCLUDES A ROTATABLY MOUNTED CAMMING ELEMENT EXTENDING INTO THE CAMMING HOLE OF SAID SECONDARY SLIDE AND WHICH IS DESIGNED TO BE ROTATED INTO CAMMING ENGAGEMENT WITH THE CAMMING RIM OF SAID SECONDARY SLIDE WHEN ROTATED IN ONE DIRECTION AND INTO CAMMING ENGAGEMENT WITH THE CAM EDGE PORTION OF SAID PRIMARY SLIDE WHEN ROTATED IN THE OPPOSITE DIRECTION, AND MEANS FOR MANUALLY ROTATING SAID CAMMING ELEMENT IN OPPOSITE DIRECTIONS FROM A NEUTRAL POSITION TO THEREBY MANIPULATE SAID LOCKBOLT INTO RIGIDLY EXTENDED DOOR-LOCKING POSITION WHEN SAID CAMMING ELEMENT IS ROTATED IN ONE DIRECTION FROM NEUTRAL POSITION, AND TO MANIPULATE SAID LOCKBOLT TO DOOR-UNLOCKING RETRACTED POSITION WHEN ROTATED IN THE OPPOSITE DIRECTION FROM NEUTRAL POSITION. 